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Started By
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Attic Insulation Question
Posted on 1/5/25 at 1:39 pm
Posted on 1/5/25 at 1:39 pm
Hello my fellow Bob Villa’s and Tim Taylor’s.
I have a 2 story house, approximately 1900 square feet, north Louisiana.
Last summer, we spray foamed the attic. Our master bedroom gets ice cold during the cold nights. In the attic, we have planks and plywood across the beams but no insulation above the sheetrock over our bedroom.
Can I place roll out insulation above the bedroom ceiling aka attic floor? Or is that hazardous to have spray foam on roof of attic and insulation below the plywood flooring in attic.
I have a 2 story house, approximately 1900 square feet, north Louisiana.
Last summer, we spray foamed the attic. Our master bedroom gets ice cold during the cold nights. In the attic, we have planks and plywood across the beams but no insulation above the sheetrock over our bedroom.
Can I place roll out insulation above the bedroom ceiling aka attic floor? Or is that hazardous to have spray foam on roof of attic and insulation below the plywood flooring in attic.
7
Posted on 1/5/25 at 2:42 pm to SomethingLikeA
How are the planks and plywood secured to the ceiling joists above the bedroom?
If just screwed down, simply unscrew it and remove the planks to allow you to place insulation between the ceiling joists and then screw the wood back down again.
It it's nailed down, that presents more of a problem since banging on the ceiling joists could potentially cause sheetrock damage to the bedroom ceiling. To not do so would require you to be extra careful removing the decking.
I would assume the reason for the plywood and planks is to be able to store things in that area. Putting insulation over the decking would negate that option.
If just screwed down, simply unscrew it and remove the planks to allow you to place insulation between the ceiling joists and then screw the wood back down again.
It it's nailed down, that presents more of a problem since banging on the ceiling joists could potentially cause sheetrock damage to the bedroom ceiling. To not do so would require you to be extra careful removing the decking.
I would assume the reason for the plywood and planks is to be able to store things in that area. Putting insulation over the decking would negate that option.
Posted on 1/5/25 at 2:46 pm to gumbo2176
The plywood and planks are not screwed down to the support joists. They are sitting on top for exactly as you described, storage. I can easily move the plywood and put some insulation, then slide the plywood back on top. I would insulate between the plywood decking and the Sheetrock.
If that would help insulate our room and not be a waste of money?
If that would help insulate our room and not be a waste of money?
This post was edited on 1/5/25 at 2:48 pm
Posted on 1/5/25 at 3:18 pm to SomethingLikeA
It will help insulate the room. It's the same principal as how older homes like mine were built with wall studs, plaster and lath on the interior walls and wood siding nailed to the outside of the studs and NO insulation between the two.
It is very insufficient when built that way as far as keeping heat and cold from penetrating the structure. That is why many people remove a few weatherboards from the structure to allow cellulose insulation to be blown in to fill the void.
It is very insufficient when built that way as far as keeping heat and cold from penetrating the structure. That is why many people remove a few weatherboards from the structure to allow cellulose insulation to be blown in to fill the void.
This post was edited on 1/5/25 at 3:19 pm
Posted on 1/5/25 at 5:54 pm to gumbo2176
Thank you for your information on this. This has been most helpful. I will kick this into gear.
Posted on 1/6/25 at 2:04 am to SomethingLikeA
Odds are they are 2X6 joists, fill that cavity with the highest R value insulation you can find. Face side against the Sheetrock. Cool weather will help with the attic temperature.
Posted on 1/6/25 at 6:53 am to SomethingLikeA
If your attic was spray foamed, it should not be getting cold enough up there to really impact the air temperature in your bedroom. It’s now “conditioned space” if it was done correctly. Do you have an uninsulated crawlspace under the house? Exterior doors or windows that could be leaking air? I’d grab an infrared laser thermometer to try and pinpoint the source of cold before fighting with insulation in the attic. Best of luck, hope you can get this solved.
Posted on 1/6/25 at 11:36 am to SomethingLikeA
Is your heater gas or electric? If electric, I heard AEP will check insulation and add for free. If gas its .35 cents a foot to add.
Posted on 1/6/25 at 9:32 pm to 24nights
Owen’s Corning Unfaced R30
Rolls
9 inches thick
Home Depot has it on their website but out at this time.
Will notify you when available.
Anybody know who might have it in stock???
Rolls
9 inches thick
Home Depot has it on their website but out at this time.
Will notify you when available.
Anybody know who might have it in stock???
Posted on 1/7/25 at 6:50 am to Ncook
quote:
Anybody know who might have it in stock???
You mentioned Home Depot, have you tried Lowes? You can also buy it at many lumber yards and the one near me has comparable pricing to both big box stores mentioned.
Posted on 1/7/25 at 8:37 am to SomethingLikeA
Was there insulation there before spray foaming the underside of your roof deck ? The idea of not insulating your ceiling is to allow your attic to become conditioned space. I would talk to your AC or a home energy expert before messing with the environment that spray foam was installed to create
This post was edited on 1/7/25 at 8:39 am
Posted on 1/27/25 at 8:38 am to SomethingLikeA
quote:
Our master bedroom gets ice cold during the cold nights.
How big a room, how many A/C drops/vents, how is the temperature in the summer?
Posted on 1/27/25 at 11:06 am to SomethingLikeA
Did the contractor spray foam over the rafters? If not you will get heat/cold transfer through the rafters. Your attic would have had ventilation from louvers, soffit vents or some other opening. Did these vents get closed off? These will allow the attic to get cold/hot. Is there insulation over the ceiling in other parts of the attic? If so this will hinder the attic from being heated/cooled from the rooms below which is what you want in a "conditioned" (spray foam) attic space. So the heat from your bedroom will be escaping into the attic but other rooms won't so those rooms will be warmer in the winter while your BR will be colder. At any rate, like others have said, roll insulation over your bedroom.
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